FIfireblocks
UTXO Management

Upsert vault and asset UTXO selection config

Creates or updates the UTXO selection strategy for this vault account and asset. ADAPTIVE is recommended. Endpoint Permission: Admin, Non-Signing Admin.

put/utxo_management/{vaultAccountId}/{assetId}/selection_config

Request

Headers

Idempotency-Keystring

A unique identifier for the request. If the request is sent multiple times with the same idempotency key, the server will return the same response as the first request. The idempotency key is valid for 24 hours.

Request body

strategy'ASC' | 'DESC' | 'ADAPTIVE' required

UTXO selection strategy. ADAPTIVE is recommended: the engine chooses inputs at selection time. ASC spends smallest UTXOs first. DESC spends largest first.

Example request

{
  "strategy": "ADAPTIVE"
}

Response

Updated UTXO selection config

Example response

{
  "configured": {
    "strategy": "ADAPTIVE",
    "updatedAt": "2026-09-09T15:00:00.000Z"
  },
  "effective": {
    "strategy": "ADAPTIVE",
    "source": "DEFAULT"
  }
}

Changes

No recorded changes to this operation across all 1 revision of this API.